Half-full or Half-empty

[rajnish manga]

Half-full or Half-empty
(From internet)

Trying to see if my daughter, maybe 4 or 5, was a pessimist or an optimist, I poured a half-glass of water and asked her "would you say that was half-full or half-empty?".

Her response - "that depends if you're drinking it or filling it".

She is now grown up, teaching primary school and utterly adored by the kids she teaches.